Last step is starting the "Absinthe" app you find on your Homescreen when the Mac-App tells you so.

Which leads you to the Greenp0ison Website which you see shortly before the device reboots.
If this fails (the Greenp0ison servers are currently highly overloaded) go to Settings->General->Network and select the "jailbreak" vpn, enable it, dismiss the error and watch you device reboots.

After the reboot you should have a Cydia app, start it; wait a few seconds; another reboot.